Wire-fastener for insulators.



110.887,10?. PATENTEDMAYlz, 19de. P. M. Loom.

WIRE PASTBNBR FOR INSULAToRs.

APPLICATION IIL'ED NOV. 24, 1905.

f 1 C yg @Nm/Ey 4UNITED srnras Nr OFFICE.-

WIRE-FASTENER FOR ISULATORS.

electric conductor and tapering retainers 'embracing th'conductor andwedged into the flaring ends of the groove for fastening the conductorto the insulator.

. The essential purpose of my invention is -to providea simple andeconomical means for expeditiously attaching the electric convaus ductorto the insulators without the iiseof tie wires or-by providing theinsulators with open sided grooves through wliicli the wires may bedrawn and temporarily retainedas .the wires are strung from pole topole, after which the tapering bushings or the retainers are forced intothe flaring ends of the grooves and for frictionally retaining the wiretherein.

-verse groove formed directlyl in its top.

A further object is to provide the tapering bushings with means to tiethem together to prevent axial displacement from their respective sides.

In the draWings-Fgure 1 is a top plan of the insulator equip )ed wit-hmy improved 'wire attaching device. Fig.. 2 is a transverse verticalsectional view through the insulator and Wire fastening device seen inFig. 1.A Fig. 3. is a similar sectional view partly in elevation of aninsulator having the trans- E ig. 4 is a perspective view of one ol thetapering bushings or'wire retainers seen in Figs. 1,2 and 3.

In order to demonstrate the practicability ofmy invention, I Ahave shownin Figs. l and 2 an insulator 1- which may be of any desired form orsize and adapted to be supported upon a pin orl other support of thecross arm or pole not necessary to herein illustrate or describe as themanner of mounting these insulators is well` known. In this instance,

and upon which is fitted a ca -3- of metal Vor any other suitablematerial which is permanently secured to the boss -'-2 by corrugatingorroughening the 'contiguous faces Specification of Letters Patent.

Application led November 24, 1905. Serial No. 288,976. i

' radia Patented May 12, .1908."

and interposing a cementitious viilli'ng* as -4-.. This cap stance', isina-de of nietalis provided-witha transverse groove -5- vopen at oneside, )referably at the top and provided with aring ends forreceivingthe. electric conductor as -G and tapering bushings orfreytainers-7-'.

The open side of the groove --5-l substantially midway between its endsis comparatively narrow or slightly wider than the diameter of the wireto allow the latter to be easily inserted or removed therethrough, butthe base of the`groove isfenlarged and is preferably circular in crosssection and rovided with flaring or vconical ends in wliic i thetapering retainers eP- are fitted. It therefore follows that the base ofthe groove is under cut or of greater transverse width than the o )enside of the. groove which prevents lL displacement of vthe bushings 7-.These bushings or retainers -7- are preferably split longitudinally at 8through one side and are provided with an aperture 9* i'or receiving theconductor -6- said bushings or retainers being slipped oyer the end olthe wire in portions with their smaller ends facing each other. or theymay be made ol suitable spring material and. adapted to be sprung over'the Wire by' opening up the split of these bushings, however, is not asessential as the tact that they are made to embrace and to slide uponthe Wire so that lwhen Stringing the wires from pole to pole, thebushings or retainers which are to be fitted in the ends olI the grooves-5- may be spread apart a sullicient distance to allow the interveningportion of the Wire to drop into said groove after which the` bushings-7- are forced toward each other into the opposite tapering ends of thegroove for locking the wire to its insulator.

In ordei to prevent the bushings from wearing loose axially from. eachother, theyl may be provided with interlocking members and wires -l0which in this instance, are

soldered to the adjacent ends of the bushingsv having their free endsadapted to be twisted one upon the other as shown in Fig. 2. It isevident, however` that many other devices may be employed for holdingthe bushings against axial displacement one from the other, and I,therefore, claim means broadly for etl'ecting such a result.

In Fig. 3, I have shown an insulator which Vin thisv in- ,y

The exact 'formation having a boss -2- in which is formed a groove .-5-which is of substantially the same form and for the same purpose as thegroove 5-, the only difference bein that 1t is formed .directly in thebody of insu ating material instead of in a sep arate cap as shown inFio's. l'and 2.

at I claim is:

1. In combination with an electric conductor and its supportinginsulator, a wire holding element on the insulator and provided with 'anunder cut groove having tapering open ends and o posite retainersgrasping t e conductor an inserted in the open ends of the groove andmeans to hold the retainers in operative position in said grooves.

2. In combination wlth an electric conduc to and its sup rtinginsulator, a metal cap i ted upon the ead of the insulator and rovidedwith a vtransverse groove in its to ace, 20 said groove being open atits upper si e, and ,tapering split bushin grasping the wire and movablele thwise t ereof and having their small ends -ven into the o positeends of said groove, -whereby the bus ings are com- 25 pressed upon thewire.

In witness whereof I have hereunto set my hand this 16th day ofNovember, 1905.

FRED M .LOCKE- Witnesses:

G. T. CURTIS, W. W. HIBBARD.

